Mini Environmental Treatment Systems (METS) provide the simplest solution for environmental compliance. CPAC's METS systems are designed to help mini, micro, and small professional photo labs meet tough environmental compliance refgulations. With their unique metering pump/collection tank design, METS are built to maximize silver recovery cartridge performance while reducing silver discharge to less than 1 ppm. Both systems include holding tanks and fixtures. Requires 2 cartridges, ordered separately. The "BIG MO" is designed for all small to medium volume labs including every minilab ever made and all but the very biggest PRO labs. With our "easy connect" adapter kits, this cartridge can be up and running on your system in minutes. The "BIG MO" recovers more silver pound for pound, it is a sealed, leak-free design.